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Whatmask

Jul 20, 2023

Convert between common subnet mask notations

Whatmask is a small C program that will help you with network settings.

It displays the following information given IP address and/or netmask

  • The netmask in the following formats CIDR, Netmask, Hex, Wildcard Bits
  • The Network Address
  • The Broadcast Address
  • The number of Usable IP Addresses
  • The First Usable IP Address
  • The Last Usable IP Address
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